Giant Error

At school, I just realized that it only works on Internet Explorer. It's far too late to change everything now. The entire thing was coded for Internet Explorer. Both I and my client only use Internet Explorer. We only have Internet Explorer on our computers at home. Most of my project was done at home, and out of habit, when I came to school, I would also use Internet Explorer. I must inform my client.

See? This is Mozilla Firefox, it's similar in Google Chrome. The layout is ineffective, the javascript is ineffective. Nothing works. I must inform my client tonight.

I cannot fix it. I checked http://www.reloco.com.ar/mozilla/compat.html which says that lists the many things that must be changed in order to make it compatible with Firefox. I suppose my project was simply too well adapted for Internet Explorer